20808431

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{947}}^1$

素因数の和:1070

約数の個数: 16

約数和(自身を含む): 24693504

約数和(自身を除く): 3885073

約数列:

[1, 7, 43, 73, 301, 511, 947, 3139, 6629, 21973, 40721, 69131, 285047, 483917, 2972633, 20808431]

約数ペア:

[(1, 20808431), (7, 2972633), (43, 483917), (73, 285047), (301, 69131), (511, 40721), (947, 21973), (3139, 6629)]